Air pollution leads to higher transmission rates of some infectious diseases whose pathogens may be borne by particulate matter. This is a source of concern for public health in countries where wood fuel is the main source of cooking energy because wood combustion emits high levels of fine particulate matter (PM$_2._5$). This project studies the effect of individual exposure to PM$_2._5$ on the probability of being infected by the SARS-CoV-2 virus during the first peak of the COVID-19 epidemic in Burkina Faso.